The 40-year-old mechanical horse racing game has attracted players of all ages to the D Las Vegas in downtown LasVegas. But according to those familiar with the machine, the days of Sigma Derby could be numbered.

A man is facing a felony charge after he allegedly “sucker punched” a 61-year-old man this month inside a downtown Las Vegas casino during an argument over a cashout voucher worth 20 cents, according to the suspect’s arrest report.